Now, we move overseas to the fast-moving changes in Ukraine. Signaling the Russians appear to have won this round, taking control of their prize, crimea. Under pressure, the Ukrainian government announced it will pull out troops. ABC's Alex Marquardt takes us inside the simmering tension as Vladimir Putin attempts to make over a new country in the image of Russia. Reporter: Falling like dominos. Today pro-russian forces stormed Ukrainian Navy headquarters. Ukraine's Navy chief was taken prisoner. As Russia takes control of crimea, symbols of the past are erased. Clocks will move ahead two hours to Moscow time. The ruble will become the official currency. There is excitement and uncertainty, as long lines snake out of banks. They don't know what will be with their money in the future. Reporter: Then, there's food. No matter what country it comes from, whether it's American chips, Italian pasta, it all comes through Ukraine. And right now, no one knows how or if that will continue. Water, power, phone lines, all come from Ukraine. Now, to connect Russia with crimea, Russia is proposing a massive construction of a bridge and tunnel. Vice president Biden, today, angrily called Russia's actions a land grab and pledged to defend nato allies. Tonight, the world is doing little more than watch Russia complete its takeover. Alex Marquardt, ABC news, crimea. And here at home, a big

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